body{background: #F3F3F3}
.problem-box{
    margin: 20px 10px;
    position: relative;
}
.problem-item{
    position: relative;
    margin: 5px 0 ;
}
.problem-item>.item-title{
    background: #fff;
    padding:5px;
    display:flex;
    justify-content: space-between;
    border-radius: 5px;
}
.problem-item>.item-title>img{
    height: 18px;
    vertical-align: middle;
    /*transform: rotate(90deg);*/
}
.problem-item>.item-conten{
    background: #fff;
    margin-top: 2px;
    border-radius: 5px;
    padding: 3px;
    font-size: 13px;
    line-height: 21px;
    color: #666;
    display: none;
    transition: all 0.5s linear;
}
.problem-item>.item-conten>a{
    color: #999;
    margin-left: 90%;
}